@[pengqiushi](/user/735164) 骚年，我建议你用vis
by 大眼仔Happy @ 2022-10-05 21:31:53
@[大眼仔Happy](/user/537046) vis是什么意思？
by pengqiushi @ 2022-10-05 21:33:33
@[pengqiushi](/user/735164) 使用记忆化dfs
by 大眼仔Happy @ 2022-10-05 21:35:19
@[大眼仔Happy](/user/537046) 这个我还没学，是什么意思？
by pengqiushi @ 2022-10-05 21:36:29
@[pengqiushi](/user/735164)
```cpp
void dfs(int x,int y)
{
if()
{
ans++;
}
for(int i=0;i<4;i++)
{
int xx=x+dx[i];
int yy=y+dy[i];
if(...||vis[xx][yy])continue;
vis[xx][yy]=1;
dfs(xx,yy);
vis[xx][yy]=0;
}
}
```
by 大眼仔Happy @ 2022-10-05 21:40:32
@[大眼仔Happy](/user/537046) 这题用深搜能做吗？
by pengqiushi @ 2022-10-05 21:43:56
@[pengqiushi](/user/735164) 应该吧，再说你这个不也……
by 大眼仔Happy @ 2022-10-05 21:48:31
@[大眼仔Happy](/user/537046) 你帮忙修改一下代码吧，谢谢。
by pengqiushi @ 2022-10-05 22:04:09
@[pengqiushi](/user/735164) 大概就我给的那样啊……
by 大眼仔Happy @ 2022-10-05 22:04:58
@[大眼仔Happy](/user/537046) 好吧，知道了。
by pengqiushi @ 2022-10-05 22:12:55